Comenzamos activando la presentación de los ejes de coordenadas.[br][br]A partir de los dos segmentos cuyas longitudes son a y b respectivamente, con [img width=39,height=19]data:image/png;base64,R0lGODlhJwATAHcAMSH+GlNvZnR3YXJlOiBNaWNyb3NvZnQgT2ZmaWNlACH5BAEAAAAALAIABAAiAAsAhAAAAAAAAAgDAA0LCwMGCwoEAwgKDQ0LCgQABAoLDQ0IBAAECgsGAwAAAwgGBAADCAsLDQoEAAQICgQAAAAABA0KCAMAAAQIDQMABAADAwgIDQMAAwoIDQoLCgECAwECAwVuICCOZGmagxAQZ+u2hfHO74EkNKks+X4ygYbjASkpArxXRDIJEAEp3mHCOh2fpiklUbFcAJFk6uvqbo3J6UVxBlQwuLIloylFyJWNISyKyrEkNnF8fFMBEhwmV0VWSQxnRwEUHRNtIz4zEQFIIyEAOw==[/img], dibujamos dos circunferencias con centro en el origen de coordenadas O, con radios a y b, respectivamente.[br][br]Para dibujar las circunferencias, utilizamos la herramienta Circunferencia dados su centro y radio.[br][br]A continuación, definimos un punto A en la circunferencia mayor y unimos con un segmento los puntos O y A.[br][br]Hallamos el punto B, intersección del segmento OA y de la circunferencia menor.[br][br]Por el punto A trazamos una recta perpendicular al eje X, y por el punto B trazamos una recta[br]perpendicular al eje Y.[br][br]El punto P, intersección de estas dos rectas, es un punto de la elipse.[br][br][img 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dibujar la elipse empleamos la herramienta Lugar geométrico, para obtener el lugar que describe el punto P cuando el punto A recorre la circunferencia.[br][br]